Eeastus b



(No Model.)

E. B. KUNKLE.

PRESSURE GAGE No. 339,559. Patented Apr. 6, 1886.

Fifi.

INVENTOR: 5 6? M64,

BY Mm I C;

ATTORNEYS.

NITED STATES- PATEN'r muons ERASTUS l3. KUNKLE, OF FORT WVAYNE, INDIANA, ASSIGNOR TO HIMSELF AND WILLIAM D. BOSTYVIOK, OF SAME PLACE.

PRESSU RE-GAG E.

SPECIFICATION forming part of Letters Patent NO. 339.559, dated April 6, 1886.

Serial No. 184,676. (No model.)

To all whom it may concern:

Be it known that I, ERASTUS B. KUNKLE, of Fort lVayne, in the county of Allen and State of Indiana, have invented certain new and useful Improvements in Pressure and Vacuum Gages, of which the following is a full, clear, and exact description.

The object of my invention is to provide certain new and useful improvements in pressare and vacuum gages, whereby the adjustmentof the parts is greatly facilitated, the construction simplified, and the gages made more durable.

The invention consists in the construction i5 and combination of parts and details, as will be fully described and set forth hereinafter,

and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part of this specification,

2c in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional view of my improved gage. Fig. 2 is a cross-sectional view of the same. Fig. 3 is a'rear view of the crystalframe,parts being broken out. Fig. 4 is a de tail view of the adjusting device.

The pointer A is mounted on the end of the shaft 13, carrying the pinion C, engaging with the segmental rack D, pivoted'at D and pro- 0 vided with the arm D to which the lower end of the connecting-rod E is pivoted, the upper end being pivoted to one end of the angle-lever F, having the segment shank G, pivoted to one end of the curved spring-tube H, having its adjacent ends closed in the usual manner. Said shank G is provided with the segmental slot J, through which the two screws K and L are passed into the adjusting-plate M on the back of the shank G,

40 the screw K serving to clamp and lock the plate M in place on the back of the shank G, and the screw L serving as a pivot for one end of the rod N, the other end of which is pivoted to that end of the tube H opposite the one to which the upper end of the shank G is pivoted. Then the movementof the pointer over the dial is not rapid enough, the plate M is raised and then looked in place by means of the screw K, and when the movement is too rapid the plate M is lowered.v The plate M can be adjusted up or down the full length of the segmental slot J without changing the position of the index or pointer at its startingpoint O, and at the same time the gage will be made to run fast or slow, just as required.

The gage can thus be adjusted very easily and rapidly without taking off or putting on the index or pointer, or interfering with the same in any manner, which is a matter of great (in importance, especially when a considerable number of like gages are to be adjusted.

The tube H is secured at its center in the tubular neck 0, which has two opposite sides beveled off, as shown at P, to fit in the inverted conical socket Q in the thickened part Q, at the bottom of the casing R, the neck, which is screw-threaded, projecting from the bottom of the casing. The nut .V is screwed on said neck 0, and is drawn up tight to press the bevels P firmly into the socket, whereby the tube H 'is held firmly and securely in the casing, and better than by using two screws or nuts, as has been customary heretofore.

The case Ris provided with an internal screw'thread at the front edge, and into said case the screwneck of the crystal-holding ring S is screwed.

The neck S is provided in its inner sur- 8o face, and adjacent to the inner edge of the ring S, with the annular groove T, for receiving the spring-ring U, which rests against the crystal or glass V, and holds the same in place in the case.

The crystal is not subject-ed to any undue strain while being fastened, nor while held on the casing.

Having thus described my invention, what I claim as new, and desire to secure by Letgo ters Patent, is-

1. In a pressure or vacuum gage, the combination, with the spring-tube, of an anglepiece having one end pivoted to one end of the spring-tube, and the other end connected 95 with the mechanism for operating the index or pointer, a plate held adj ustably on said an gle-piece, and a rod connecting said plate with the other end of the spring-tube, substantially as herein shown and described.

2. In a pressure or vacuum gage, the combination, with the spring-tube H, of the angle-piece F, pivoted to one end of the same, or pointer, substantially as hereinshown and and provided with the curved slot J, the addescribed. justable plate M, held on the piece F by a 1 T Screw passed through the slot J the rod N, LRASTUS KUL K 5 connecting the plate M with the other end of Witnesses:

the tube H, and of a rod connecting the piece MARION A. \VEBB, FWi'Dh the mechanism for operating the index I CHARLES H. WORDEN. 

